Difficulty: Medium
Average Score: 89%
Simulated
A nurse is reviewing the electrocardiogram (ECG) results. Which portion of the conduction system does the nurse consider when evaluating the P wave?
Correct answer
B
Rationale
The correct answer is B: SA Node. The nurse evaluates the P wave to assess atrial depolarization, which is initiated by the SA Node. The SA Node is the natural pacemaker of the heart, generating an electrical impulse that spreads through the atria, causing them to contract. The P wave represents the depolarization of the atria on the ECG. The other choices are incorrect because:
A: AV Node is responsible for delaying the electrical impulse before passing it to the ventricles.
C: Purkinje Fibers are involved in the rapid conduction of the electrical impulse to the ventricles.
D: Bundle of HIS is part of the electrical conduction pathway between the atria and ventricles.
A: AV Node is responsible for delaying the electrical impulse before passing it to the ventricles.
C: Purkinje Fibers are involved in the rapid conduction of the electrical impulse to the ventricles.
D: Bundle of HIS is part of the electrical conduction pathway between the atria and ventricles.